[LAD] Client connection to JACK fails with socket error -- help?

[Simon Kalteis]

Hello all!

My name is Simon, I am a long-time user of JACK on Debian-based Linux
systems. I prefer to compile JACK myself so I always set the
JACK-packages in Debian to "hold", remove everything from /usr and put
my build into /usr/local.

Starting with Debian 6.0 "squeeze" (Kernel is 2.6.38-1-686 #1 SMP), this
seems to cause problems somewhere. I checked out jackdmp from SVN
yesterday, build was ok. jackdmp starts up, QJackCtl is able to connect
and the connection graph shows up.

But any other client I want to use with JACK causes the following error:

[snip]
Cannot connect to server socket err = No such file or directory
Cannot connect to server socket
jack server is not running or cannot be started
[/snip]

My test client of choice is mplayer. (SVN r3418)

I checked whether the runtime linker uses the correct libs:

/usr/local/bin/mplayer
libjack.so.0 => /usr/local/lib/libjack.so.0 (0xb718a000)

This should be ok.

The list of file descriptors for the running jack server is
[snip]
jackd   13063 simon  cwd    DIR        8,6    36864  146594 /home/simon
jackd   13063 simon  rtd    DIR        8,6     4096       2 /
jackd   13063 simon  txt    REG        8,6    22899
223189 /usr/local/bin/jackd
jackd   13063 simon  mem    REG        8,6   145629
236929 /usr/local/lib/jack/jack_alsa.so
jackd   13063 simon  mem    REG       0,16 82493164
2070826 /dev/shm/jack-1000-0
jackd   13063 simon  mem    REG        8,6  1153328
391304 /usr/lib/libasound.so.2.0.0
jackd   13063 simon  DEL    REG       0,16
2995543 /dev/shm/jack-1000-2
jackd   13063 simon  DEL    REG       0,16
2995541 /dev/shm/sem.hTRyxy
jackd   13063 simon  DEL    REG       0,16
2070960 /dev/shm/sem.2Jamky
jackd   13063 simon  mem    CHR      116,5
241895 /dev/snd/pcmC0D0p
jackd   13063 simon  mem    CHR      116,6
241896 /dev/snd/pcmC0D0c
jackd   13063 simon  mem    REG        8,6  1323460
246009 /lib/i686/cmov/libc-2.11.2.so
jackd   13063 simon  mem    REG        8,6   116600
228035 /lib/libgcc_s.so.1
jackd   13063 simon  mem    REG        8,6   149392
245993 /lib/i686/cmov/libm-2.11.2.so
jackd   13063 simon  mem    REG        8,6    30684
245999 /lib/i686/cmov/librt-2.11.2.so
jackd   13063 simon  mem    REG        8,6     9736
246001 /lib/i686/cmov/libdl-2.11.2.so
jackd   13063 simon  mem    REG        8,6   117367
245998 /lib/i686/cmov/libpthread-2.11.2.so
jackd   13063 simon  mem    REG        8,6   958479
223178 /usr/local/lib/libjackserver.so.0.1.0
jackd   13063 simon  mem    REG        8,6   975012
214075 /usr/lib/libstdc++.so.6.0.13
jackd   13063 simon  DEL    REG       0,16
2070886 /dev/shm/sem.5FWprn
jackd   13063 simon  mem    REG       0,16     1012
2070831 /dev/shm/jack-1000-1
jackd   13063 simon  mem    REG       0,16    70712
1906270 /dev/shm/jack-shm-registry
jackd   13063 simon  mem    REG        8,6   113964
228057 /lib/ld-2.11.2.so
jackd   13063 simon    0r  FIFO        0,8      0t0 2070809 pipe
jackd   13063 simon    1w  FIFO        0,8      0t0 1906224 pipe
jackd   13063 simon    2w  FIFO        0,8      0t0 1906224 pipe
jackd   13063 simon    3u   CHR      116,7      0t0
241899 /dev/snd/controlC0
jackd   13063 simon    4u  unix 0xece16900      0t0
2070957 /dev/shm/jack_(default)_1000_0
jackd   13063 simon    5u   CHR      116,5      0t0
241895 /dev/snd/pcmC0D0p
jackd   13063 simon    6u   CHR      116,6      0t0
241896 /dev/snd/pcmC0D0c
jackd   13063 simon    7u  unix 0xece166c0      0t0 2070959 socket
jackd   13063 simon    8u   CHR      116,1      0t0    2555 /dev/snd/seq
jackd   13063 simon    9u  unix 0xece16000      0t0
2070962 /dev/shm/jack_(default)_1000_0
jackd   13063 simon   10u  unix 0xf4c71200      0t0
2995537 /dev/shm/jack_(default)_1000_0
jackd   13063 simon   11r  FIFO        0,8      0t0 1906200 pipe
jackd   13063 simon   12w  FIFO        0,8      0t0 1906200 pipe
jackd   13063 simon   13u  unix 0xf4f81440      0t0 2995542 socket
jackd   13063 simon   17r  FIFO        0,8      0t0 1906224 pipe
jackd   13063 simon   18w  FIFO        0,8      0t0 1906224 pipe
[/snip]

So the server apparently has sockets open -- question is why are
clients except QJackCtl unable to connect to them?

I am out of ideas. I basically recompiled everything from source a few
times (including alsa-lib, libsndfile, jack, mplayer) and nothing
changed.

I appreciate any help on this problem. Thank you very much in advance!

Simon

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